Modules: Daily rewards

A reusable login streak system (@rbx/rewards). Status: Implemented (35 tests).

Purpose

• Drive retention via daily claims.
• Support streaks and catch-up rules.

Core rules

• All claims are server validated.
• Claims are idempotent (dailyRewardClaimId).
• Time logic uses server time only.

Data model

• lastClaimDay — server day index of last claim
• streakCount — consecutive login days
• gracePeriod — configurable missed-day allowance before streak reset
• rewards[] — ordered reward definitions per day
• Achievement tracking via AchievementStore with progress counters

Security

• Client requests claim.
• Server checks day window and prevents duplicates.
• Rate limit claim requests.

Config/flags

• dailyRewards.enabled (kill-switch)
• dailyRewards.calendar (reward schedule)

Observability

• progression.daily_reward_claimed
• progression.daily_streak_reset
• security.daily_reward_duplicate_claim